Utility knife



FIG. 1 is a perspective view of a utility knife showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top side elevational view thereof;

FIG. 5 is a bottom side elevational view thereof;

FIG. 6 is a front end elevational view thereof; and,

FIG. 7 is a rear end elevational view thereof.

The broken line representations of portions of the utility knife in FIGS. 1–7 do not limit the claimed design. 

The ornamental design for a utility knife, as shown and described. 